Pure alumina is found crystallized in those precious gems, the oriental ruby and
sapphire, which are next in hardness and value to the diamond. Emery is also
nearly pure alumina. Alumina is an abundant ingredient in many other minerals,
...

Or Universal Dictionary of Knowledge ... Comprising the Twofoldadvantage of a Philosophical and an Alphabetical Arrangement, with Appropriate Engravings by Edward Smedley, Hugh James Rose, Henry John Rose

Pure Alumina is a white, bland powder, adhering to the tongue, but neither
exciting smell nor taste. It forms a paste with water: is infusible, except by the
flame of the Gas blow-pipe. There is a peculiar smell excited by breathing upon
an ...

Pure Alumina is a white, bland powder, adhering to the tongue, but neither
excitin-r smell nor taste. It forms a paste with water: is infusible, except by the
flame of the Gas blow-pipe. There is a peculiar smell excited by breathing upon
an ...

With Instructions for the Qualitative Analysis of Minerals by Joshua Trimmer

Alumina is a very common earth: it occurs in every country, and in rocks of all
ages, and the aluminous rocks are among the most abundant in every formation.
It is an important ingredient in soils, imparting to them tenacity and the power of ...

Alumina is the ceramic oxide with the highest economic importance. It is used as
rubies or yttrium-alumina-garnets for lasers, and used as heat-resistant
combustion chambers. 334 DIFFERENT FIELDS OF APPLICATIONS High-Purity
Ceramic ...

Alumina is the most thoroughly investigated catalyst from this point of view.
Parera and Figoli (ref. 6) and Scharme (ref. 7) reported that the addition of
sodium to alumina involved a decrease of surface acidity. Chuang and cowork . (
ref.

An International Symposium in Honor of Professor Norio Sato by Masahiro Seo, Electrochemical Society. Corrosion Division

INTRODUCTION Anodic alumina is the dielectric film in Al electrolytic capacitors.
Either amorphous AI2O3 or crystalline y'-alumina is made depending on growth
conditions, and these have different properties (Table 1). The lower ionic ...

Alumina is a very stable and robust material and has been extensively studied.
Recently, Al2O3 NFETs with 80nm effective gate length have shown more than
two order of magnitude reduction in leakage currents and equal or better
reliability ...

These catalysts can be classified with other carbonium catalysts such as sulfuric
and phosphoric acid, aluminum and boron halides, and silica- alumina.
Accordingly, zeolites have definable activities for cracking isomerization.
alkylation.

ALUMINA, NATURAL ABRASIVE Al2O3 recrystallized from a molten bath by a
process which results in particle or crystal sizes generally smaller than regular
alumina; used as a fine abrasive and polishing compound. alumina, natural
abrasive ...